TSX7191ILT STMicroelectronics Integrated Circuit (SOT23 (5-Pin)) In Stock
TSX7191ILT is a low-power precision rail-to-rail operational amplifier from STMicroelectronics with a 9.0 MHz gain-bandwidth product, 16 V maximum supply, 450 µV maximum input offset voltage, and 50 pA bias current in a SOT-23-5 package. It serves precision signal conditioning, active filter, and sensor amplification applications requiring wide dynamic range on supplies up to 16 V.
- Manufacturer
- STMicroelectronics
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TSX7191ILT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 9.0 MHz gain-bandwidth product enabling active filter designs up to several MHz
- 450 µV maximum input offset voltage for precision DC measurement accuracy
- 50 pA ultra-low input bias current ideal for high-impedance pH and photodiode sensors
- Rail-to-rail input and output for maximum signal swing on supplies from 2.7 V to 16 V
- 102 dB typical CMRR for superior common-mode noise rejection in differential measurements
- SOT-23-5 compact package for space-constrained portable and wearable analog front-ends
Applications
TSX7191ILT is designed for precision analog signal conditioning in industrial sensor front-ends, medical diagnostic instruments, and portable measurement devices that require low offset voltage and wide supply flexibility up to 16 V on a single chip. It excels in active filter stages, instrumentation buffer amplifiers, and transimpedance amplifier designs where the 9 MHz bandwidth and 50 pA bias current minimize loading on high-impedance sources such as photodiodes and electrochemical sensors. The device is also used in battery-operated IoT nodes and handheld calibrators where the compact SOT-23-5 footprint and low quiescent current enable long runtime from small battery cells.
Specifications
| Factory Lead Time | 24Weeks |
| YTEOL | 8 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.0002 µA |
| Bias Current-Max (IIB) @25C | 0.00005 µA |
| Common-mode Reject Ratio-Min | 83dB |
| Common-mode Reject Ratio-Nom | 102dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 450 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Low-Bias | YES |
| Low-Offset | YES |
| Micropower | NO |
| Number of Functions | 5 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Slew Rate-Min | 1.1V/us |
| Slew Rate-Nom | 2.5V/us |
| Supply Current-Max | 1mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 4V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Unity Gain BW-Nom | 7700 |
| Voltage Gain-Min | 63095 |
| Wideband | NO |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How precise is the TSX7191ILT input offset voltage and how does it affect a DC sensor measurement circuit?
TSX7191ILT guarantees a maximum input offset voltage of 450 µV, which introduces a worst-case DC error of 450 µV referred to the input of an amplifier. In a signal chain amplifying a 100 mV full-scale sensor output with a gain of 10, this offset contributes a 4.5 mV output error, representing a 0.45% accuracy limitation. For applications requiring better than 0.1% accuracy, external offset trimming or a chopper-stabilized amplifier with sub-10 µV offset would be needed instead.
What supply voltage range does TSX7191ILT support, and can it operate from both 3.3 V and 12 V rails in the same design family?
TSX7191ILT operates from 2.7 V to 16 V single supply or ±1.35 V to ±8 V dual supply, making it compatible with 3.3 V microcontroller-adjacent analog stages and 12 V industrial sensor transmitter circuits in the same device family. This wide range eliminates the need for separate op-amp part numbers across product lines, simplifying BOM management for companies designing both battery-powered IoT sensors and 4-20 mA loop-powered industrial transmitters.
How does the 9 MHz gain-bandwidth product of TSX7191ILT enable active low-pass filter design at audio and instrumentation frequencies?
With a 9 MHz gain-bandwidth product, TSX7191ILT supports closed-loop gains of up to 100 V/V while maintaining 90 kHz bandwidth, or gains up to 10 V/V at 900 kHz. This makes it suitable for anti-aliasing filters in 24-bit ADC front-ends sampling at 200 kSPS or faster, and for Sallen-Key low-pass filter stages with corner frequencies up to 500 kHz at unity gain. The 9 MHz GBW exceeds that of many lower-cost precision op-amps in the same package, reducing the need for a higher-power wideband alternative.
Why is the 50 pA input bias current of TSX7191ILT important for photodiode or electrochemical sensor designs?
At 50 pA maximum input bias current, TSX7191ILT introduces a voltage error of only 50 µV when driving through a 1 MΩ feedback resistor in a transimpedance amplifier, preserving measurement accuracy for photodiode currents as small as 1 nA. Electrochemical sensors such as gas sensors and pH probes have source impedances of 10 MΩ to 1 GΩ; a 50 pA bias current causes an error of just 500 µV at 10 MΩ, which is within the noise floor of most 12-bit ADC systems and does not degrade measurement resolution.
How does TSX7191ILT compare to a standard LM324 for a precision industrial 4-20 mA transmitter design?
TSX7191ILT significantly outperforms LM324 in precision metrics: TSX7191ILT offers 450 µV maximum offset versus LM324's 7 mV typical offset, a 9 MHz GBW versus LM324's 1 MHz, and 50 pA bias current versus LM324's 45 nA. In a 4-20 mA loop transmitter with a 5 V reference, LM324's 7 mV offset alone produces a 0.14% span error, while TSX7191ILT's 450 µV offset contributes only 0.009% span error, meeting the 0.1% accuracy requirement typical of Class B industrial transmitters without external offset trim components.
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